Brake-shoe



PATEN TED JAN. 5, 1904.

FITZ WILLIAM SARGENT.

BRAKE SHOE. APPLICATION FILED JULY 6, 1903.

no MODEL.

Mei/265$.

UNITED STATES Patented January 5, 1904.

PATE T OFFICE.

FITZ WILLIAM SARGENT, OF MAHWAH, NEW JERSEY, ASSIGNOR TO AMERI- CAN BRAKE SHOE 8a FOUNDRY COMPANY, OF JERSEY CITY, NEW JER- SEY, A CORPORATION OF NEW JERSEY.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 749,103, dated January 5, 1904.

Application filed July 6, 1903. Serial No.164.287. (No model.)

To all whom it may concern.-

a citizen of the United States, residing at Mahwah, in the State of New Jersey, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

My invention relates to the brake-shoes or wearing-blocks such as employed upon railway-car brakes, and particularly to that form of shoe which is cast and provided with a strengthening safety-back, generally made of sheet-steel.

The objects of my invention are to provide a back for such brake-shoes which gives rigidity to strengthen the shoe. and at the same time has improved means for securing the back on the shoe by embedding it in the cast metal, to provide a back for a cast shoe which is economical in material, easily put in place, securely fixed to the shoe at all points, and is itself of a form to give increased rigidity and strength against bending or fracture. These objects and other advantages which will hereinafter appear I attain by means of the construction illustrated in preferred form in the accompanying drawings, wherein- Figure l is a side elevation of my improved back for brake-shoes, the shoe being indicated in dotted lines. Fig. 2 is a plan view of the back, with the shoe indicated in dotted lines. Figs. 3 and t are vertical crosssections, taken, respectively, on the lines 00 and y of the other figures, through a cast brake-shoe having my improved back inserted therein.

In order to allow of the greatest possible economy of metal in brake-shoes by providing for complete wearing out of the same and at the same time to insure the shoe when worn thin against breaking into pieces and falling out of the head, it is customary to provide cast brake-shoes with a flat steel back, and various means have been devised for attaching the back to the shoein a secure and economical manner.

In my present improvement I make the backing a of malleable metal in a generally flattened form, but slightly convex laterally throughout its length, so as to add stiffness to the back and at the same time provide for embedding the edge of the back in the metal of the shoe, while the central part lies flush Be it known that I,F1Tz WILLIAM SARGENT,

with the rear surface of the cast shoe. The back may conveniently have cut-out portions 19 under the central lug and open portions 0 on the sides to economize metal. It is made of the curved or upwardly-convexed form laterally, as shown in Figs. 3 and 4, and is preferably embedded in the brake-shoe d in the act of casting the latter, so that the convex part of the back will lie about flush with the surface of the back of the shoe and the outer edges of the back a, will dip into the cast metal and be thoroughly embedded and anchored therein along the entire length, as well as at the ends. This form attains all the stiffness that is possible without bringing the backing nearer to the wearing-face of the shoe, and at the same time provides for the most secure anchorage of the backing in the shoe without any necessity for separate attaching devices or for cutting and stamping out portions of the back, which would very much weaken it.

The many advantages of the device will readily occur to those familiar with the use of brake-shoes.

Having thus described my invention and illustrated its use, what I claim, and desire to secure by Letters Patent, is the following:

1. A brake-shoe provided with a back longitudinally parallel with the face of the shoe and laterally convexed in section, the edges being embedded in the shoe in casting the latter.

2. A cast brake-shoe having a steel back with downturned and embedded edges along its entire length.

3. A steel back for a brake-shoe being upwardly convexed along its entire length and lying flush with the back of the shoe with its edges embedded in the metal of the shoe.

4. Abrake-shoe having a back composed of a steel plate convex crosswise and having its edges embedded in the cast metal of the shoe, substantially as described.

In testimony whereof I have hereunder signed my name in the presence of the two subscribing witnesses.

FITZ WILLIAM SARGEN'I.

Witnesses:

RICHARD WANMAKER, JOHN R. WANMAKER. 

